/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.util;



import com.bff.gaia.unified.sdk.schemas.Schema;

import com.bff.gaia.unified.sdk.values.Row;

import com.bff.gaia.unified.vendor.guava.com.google.common.collect.ImmutableSet;



import static com.bff.gaia.unified.sdk.schemas.Schema.TypeName.*;



/**

 * Validates if the types specified in {@link Row} {@link Schema} are supported for conversion from

 * Json.

 */

class RowJsonValidation {



  private static final ImmutableSet<Schema.TypeName> SUPPORTED_TYPES =

      ImmutableSet.of(BYTE, INT16, INT32, INT64, FLOAT, DOUBLE, BOOLEAN, STRING, DECIMAL);



  static void verifyFieldTypeSupported(Schema.Field field) {

    Schema.FieldType fieldType = field.getType();

    verifyFieldTypeSupported(fieldType);

  }



  static void verifyFieldTypeSupported(Schema.FieldType fieldType) {

    Schema.TypeName fieldTypeName = fieldType.getTypeName();



    if (fieldTypeName.isCompositeType()) {

      Schema rowFieldSchema = fieldType.getRowSchema();

      rowFieldSchema.getFields().forEach(RowJsonValidation::verifyFieldTypeSupported);

      return;

    }



    if (fieldTypeName.isCollectionType()) {

      verifyFieldTypeSupported(fieldType.getCollectionElementType());

      return;

    }



    if (!SUPPORTED_TYPES.contains(fieldTypeName)) {

      throw new RowJsonDeserializer.UnsupportedRowJsonException(

          fieldTypeName.name()

              + " is not supported when converting JSON objects to Rows. "

              + "Supported types are: "

              + SUPPORTED_TYPES.toString());

    }

  }

}